208 lines
7.1 KiB
Python
208 lines
7.1 KiB
Python
from __future__ import annotations
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import asyncio
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from collections.abc import AsyncIterator
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from pathlib import Path
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from lambda_agent_api.server import MsgEventSendFile, MsgEventTextChunk
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from sdk.agent_api_wrapper import AgentApiWrapper
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from sdk.interface import (
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Attachment,
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MessageChunk,
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MessageResponse,
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PlatformClient,
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PlatformError,
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User,
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UserSettings,
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)
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from sdk.prototype_state import PrototypeStateStore
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class RealPlatformClient(PlatformClient):
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def __init__(
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self,
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agent_api: AgentApiWrapper,
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prototype_state: PrototypeStateStore,
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platform: str = "matrix",
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) -> None:
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self._agent_api = agent_api
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self._prototype_state = prototype_state
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self._platform = platform
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self._chat_apis: dict[str, AgentApiWrapper] = {}
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self._chat_api_lock = asyncio.Lock()
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self._chat_send_locks: dict[str, asyncio.Lock] = {}
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@property
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def agent_api(self) -> AgentApiWrapper:
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return self._agent_api
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async def _get_chat_api(self, chat_id: str):
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chat_key = str(chat_id)
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chat_api = self._chat_apis.get(chat_key)
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if chat_api is None:
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async with self._chat_api_lock:
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chat_api = self._chat_apis.get(chat_key)
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if chat_api is None:
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chat_api = self._agent_api.for_chat(chat_key)
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await chat_api.connect()
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self._chat_apis[chat_key] = chat_api
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return chat_api
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def _get_chat_send_lock(self, chat_id: str) -> asyncio.Lock:
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chat_key = str(chat_id)
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lock = self._chat_send_locks.get(chat_key)
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if lock is None:
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lock = asyncio.Lock()
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self._chat_send_locks[chat_key] = lock
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return lock
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async def get_or_create_user(
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self,
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external_id: str,
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platform: str,
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display_name: str | None = None,
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) -> User:
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return await self._prototype_state.get_or_create_user(
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external_id=external_id,
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platform=platform,
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display_name=display_name,
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)
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async def send_message(
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self,
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user_id: str,
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chat_id: str,
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text: str,
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attachments: list[Attachment] | None = None,
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) -> MessageResponse:
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response_parts: list[str] = []
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sent_attachments: list[Attachment] = []
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message_id = user_id
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lock = self._get_chat_send_lock(chat_id)
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async with lock:
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chat_api = await self._get_chat_api(chat_id)
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try:
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async for event in self._stream_agent_events(
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chat_api, text, attachments=attachments
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):
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message_id = user_id
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if isinstance(event, MsgEventTextChunk) and event.text:
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response_parts.append(event.text)
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elif isinstance(event, MsgEventSendFile):
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attachment = self._attachment_from_send_file_event(event)
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if attachment is not None:
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sent_attachments.append(attachment)
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except Exception as exc:
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await self._handle_chat_api_failure(chat_id, exc)
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await self._prototype_state.set_last_tokens_used(str(chat_id), 0)
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response_kwargs = {
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"message_id": message_id,
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"response": "".join(response_parts),
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"tokens_used": 0,
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"finished": True,
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"attachments": sent_attachments,
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}
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return MessageResponse(**response_kwargs)
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async def stream_message(
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self,
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user_id: str,
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chat_id: str,
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text: str,
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attachments: list[Attachment] | None = None,
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) -> AsyncIterator[MessageChunk]:
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lock = self._get_chat_send_lock(chat_id)
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async with lock:
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chat_api = await self._get_chat_api(chat_id)
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try:
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async for event in self._stream_agent_events(
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chat_api, text, attachments=attachments
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):
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if isinstance(event, MsgEventTextChunk):
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yield MessageChunk(
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message_id=user_id,
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delta=event.text,
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finished=False,
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)
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elif isinstance(event, MsgEventSendFile):
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continue
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except Exception as exc:
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await self._handle_chat_api_failure(chat_id, exc)
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await self._prototype_state.set_last_tokens_used(str(chat_id), 0)
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yield MessageChunk(
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message_id=user_id,
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delta="",
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finished=True,
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tokens_used=0,
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)
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async def get_settings(self, user_id: str) -> UserSettings:
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return await self._prototype_state.get_settings(user_id)
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async def update_settings(self, user_id: str, action) -> None:
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await self._prototype_state.update_settings(user_id, action)
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async def disconnect_chat(self, chat_id: str) -> None:
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chat_key = str(chat_id)
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chat_api = self._chat_apis.pop(chat_key, None)
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self._chat_send_locks.pop(chat_key, None)
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if chat_api is not None:
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close = getattr(chat_api, "close", None)
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if callable(close):
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await close()
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async def close(self) -> None:
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for chat_api in list(self._chat_apis.values()):
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close = getattr(chat_api, "close", None)
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if callable(close):
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await close()
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self._chat_apis.clear()
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self._chat_send_locks.clear()
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async def _stream_agent_events(
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self,
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chat_api,
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text: str,
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attachments: list[Attachment] | None = None,
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) -> AsyncIterator[object]:
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attachment_paths = self._attachment_paths(attachments)
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event_stream = chat_api.send_message(text, attachments=attachment_paths or None)
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async for event in event_stream:
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yield event
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async def _handle_chat_api_failure(self, chat_id: str, exc: Exception) -> None:
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await self.disconnect_chat(chat_id)
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code = getattr(exc, "code", None) or "PLATFORM_CONNECTION_ERROR"
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raise PlatformError(str(exc), code=code) from exc
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@staticmethod
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def _attachment_paths(attachments: list[Attachment] | None) -> list[str]:
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if not attachments:
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return []
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paths = []
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for attachment in attachments:
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if attachment.workspace_path:
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paths.append(attachment.workspace_path)
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return paths
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@staticmethod
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def _attachment_from_send_file_event(event: MsgEventSendFile) -> Attachment:
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location = str(event.path)
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filename = Path(location).name or None
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workspace_path = location
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if workspace_path.startswith("/workspace/"):
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workspace_path = workspace_path[len("/workspace/") :]
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elif workspace_path == "/workspace":
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workspace_path = ""
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return Attachment(
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url=location,
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mime_type="application/octet-stream",
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size=None,
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filename=filename,
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workspace_path=workspace_path or None,
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)
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